Signaling system.



. M. L. JOHNSON. SIGNALING SYSTEM.

AAPPLIOQATIOH rum) JULY 1 6, 1912. 1,105,350. I

Patented Ju1y 28, 1914 2 SHEETS-SHEET 1.

SWITCH 33: I WiTNSQg 1m EN 115R MORTONLJJOHNSON ATTO RNBY M. L. JOHNSON. SIGNALING SYSTEM.

APPLICATION FILED JJULY 15,1912.

Patented July 28, 1914.

2 SHEETS-SHEET 2.

wu-Nkssss v 'IVNVIEZNTIOR ,v BYMOR'ION LnJoHNsofq Arr DRNEY T aZZ whom, it may concern; v

Be it known that LMoRToN L. JonNsoN UNiEn STA-tens PATENT OFFICE.

MORTON L. JOHNSON, OF CHICAGO, ILLINOIS, ASSIGNOR, BYJVIESNE ASSIGNMENTS, TO FRANK B. COOK COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

SIGNALING SYSTEM.

Sp c of Letters a Patented July 28, 1914;

Application filec't 1111 .15 1912 sens-rm. 7 9,429.

citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful lmprovement 1n Signaling Systems,

ot which the following is a full, clear, comcise, and exact description, reference being had to the accompanying drawings, forming a partof this specification.

My invention-relates to signaling systems and has for its object the provision of such a system in which a plurality of signal send- .iug lines may be separably associated with a signal receiving instrument which is interclnmgeably associated with .the sending lines by means of suitable selector switching mechanism, there being preferably provided a plurality of signal receivers less in nlnnher than the sending lines, the selector mechanism serving to associate sendinglines with idle signal receivers to the exclusion of signal receivers previouslv associated with other sending lines. Y

My invention is of particular service in connection with telephone exchange systems andby means of the invention l am enabled to receive and. if desired to record the numbers of calling lines by signal receivers that are less in number than the lines and which are selectively associated with the lines in the general manner which has been described. These signal receivers may. if desired; be individual to the operators positions and the circuits for cttecting their operation may, it desired, be accompanied by cnnduct-ors constituting selected extcn-' sions of calling lines with which the oper-.. at'ors telephones may bca-onneetcd in order that the operators may ascertain the numbers of the called lines. the signal receivers then serving to indicate to the operators the numbers of the calling lines. \Vhcn the operators have been iut'ormed automatically of the numbers of the calling lines by m ans of said signal receivers and have been informed by the calling subscribers of the numbers of the desired lines. the operators.

may proceed to connect the calling and called lines by usual or preferred equipment.

i will explain my invention more fully by reference to the accompanying drawings in which Figures 1 and 2, taken collectively with the conductors at the topsof the sheets in ahnement, illustrate a telephone exchange system having -the signaling system of my invention.

I have shown but one telephone line extending to station N0. 1357, though it will,

through the influence of the telephone re ceiver 2 when upon the switch hook, whereby a signal bell bridge including a signal hell 3 and a condenser -l,is connected between the sides of the line: The telephone switch hook 1 has an alternateeontact which is engaged thereby when the receiver .2 is removed, whereby a telephone bridge is established between the sides of the line and which bridge includes a telephone receiver 2 and telephone transmitter 5. The line sides terminate at the exchange in the armature switches of a cutoff relay (i having alternate contacts that are engaged by the armature switches when calling lines are extended whereby the multiple jacks 7 are connected with lines whether calling or called so that the operator may connect the calling and called lines by means of any pre terred equipment such as the cord circuit link connector equipment illustrated at S. T will not describe the link connectors as the illustration furnished will be snflicient to enable the same readily to be understood by those skilled in the art; I have illustrated another telephone line extending from i the station A to the exchange and there provided with multiple jacks 9, it being understood that there may be a number of such lines, the line extending to station A not being equipped with the apparatus of the invention. though of course the invention is not to be limited to lines of the mixed character extending to station 1357 and station The line extending to station A has been illustrated as an ordinary manual telephone l ne inorder to simplify the illustration of the system employing my invention.

It may be assumed that station 1357 is a calling station and that station A is a called armature switch, to the grounded lower coil of the relay 11. The relay 11 upon being thus energized attracts its grounded armature switch to establish a circuit Whichlmay be traced from this switch and its alternate contact, the sluggishly operating interrupter relay 12, the motor magnet 13, the side switch wiper 14 in its first position, to the grounded battery 10. The motor magnet 13 thus sets the wipers 15, 16, 17 and 18 into operation until the wiper encounters an ungrounded contact whereupon the private relay 19 (whose circuit was previously closed upon the initial energization of the motor magnet 13) is deenergized, this private re lay thereupon moving the side switch wipers 14 and 20 to their second positions, the side switch wiper 14 in its second position opening the circuit of the magnet 13 whereby the wipers 15, 16, 17 and 18 are arrested. When the side switch wiper 20 is in its second position it engages a grounded contact whereb the wiper 15 of the actuated selector switc is grounded and the contact engaged. by the wiper 15 is grounded together with other contacts in multiple with this contact that are distributed among other selector switches which are operable by other calling lines whereby such other selector switches will not stop with their wipers 15 upon contacts thus groundedflso that callingsubscribers will not causethe wipers of selector switches which they operate to rest upon contacts that are in multiple with contacts or other selector switches whose wipers are in electrical connection therewith. It will be understood that the waiting contacts of the wipers 15, 16, 17 and 18 of the difierent switches are respectively multiplied.- I have shown the selector switch associated with line 1357 as being individual to that line though the iii-- 'vention. not to be limited to this individuality. When the wiper 15 has-engaged an ungrounded contact the. companion wipers are in connection with conductors which lead to signal receiving equipment thatis free to-be associated with the calling line and with telephone conductors, that lead to the operators position havin'g signalm ceiving equipment.

- I have shown two well known ticker recorders which may be employed in practising the invention, each recorder being'illustrated as belonging to an operators position within range of the operators at these positions. Each recording signal instrument illustrated 7C includes a polarized magnet 21 whose armature oscillates the well known ratchet wheel actuating device 22, the ratchet wheel 23 which is actuated being fixed upon a shaft 1 24 that carries a printing wheel 25 provided with printing characters, the said shaft also carrying a weighted pulley 26 for turningthe shaft when it is permitted to turn by the operation of the magnet 21. The equipment also includes a printing magnet 0 27 whose armature presses a paper tape 28 against the printing wheel 25 when printing is to be efiected. The periphery of the printing wheel 25 is inked by an inking roller 29.' The paper tape is fed in any suit- 35 able way familiar'to those skilled in the art. Direct: currents of opposite polarity'are applied alternately to the winding of the polarized magnets 21 whereby the shafts 24 are continuously kept in rotary stepping movement,- the shafts 24 being turned step 7 by step in order that the printing characters upon the faces of the printing wheels 25 may be properly presented to the tape. I have shown a source of grounded direct cur- 5 rent 30 for impressing current of'positive polarity upon the magnets 21 and a source of grounded direct current 31 for impressing current of negative polarity upon the magnets .21. The positive and negative ter- 1 0 min'al's, respectively,.-of the sources of cur"- rent 30 and 31 are connected by brushes with. disks 32, 33 that are fixedly mounted upon an insulated shaft 34 driven by a motor 35.. These disks are provided with metallic continuations 36 which are flush with sections of insulating material 37. Brushes 38, 39 are successively engaged by the projections 36, the engagement between one brush and each finger 36 of one disk being followed 30 later by engagement between the other brush and the finger 36 of the other disk. The brushes 38 and 39 constitute multipled terminals of each polarized magnet 21, the other terminal of each of these magnets being grounded. Two of the fingers or projections 36 upon each disk 32, 33 are spaced apart and the remaining fingers or projections are s aced 60 apart, there thus being five such gers to each disk. Each disk 120 thus causes the energization of each magnet 21 five times in each disk revolution, each of the five energizations occasioned by one disk being followed 30 later by the energization of the magnets 21 efiected by the other disk. As-these disks direct positive and negative current respectively to the polar- I ized magnets 21 the armatures of these magnets havefigacomplete oscillations for each revolutioni of the shaft 34. The shaft 24 measles prevail substantially throughout 60 of r0-,

tation of the shaft 34, the shaft 24 thus having ten-periods of rest during each-revolution of the shaft 34. The equipment having the elements 21 to 39; inclusive; is well known by those skilled in the art. Each' telephone line has individually related there to a ratchet wheel 40 which is adapted to be stepped around by amotor magnet 41 that operates a pawl 42 in engagement with the ratchet. Each line has a switch 43 individual thereto and'employed for connecting the battery 10 with the motor magnet, this switch 43 being closed by means. of a relay i4 (one for each'line) when it is energized upon the location of the side switch wiper 14 oftheactuated selector switch in its second position by means of a circuit whichis so clear as to need no description. The shaft 34 carries a disk 45 that has electrical connection with a brush 46 but once during each revolution of the shaft Circuit having been previousiypartially established for the motor magnet 41 at 43, circuit for this magnet is completed onceon each revolutionof the shaft 34 so that the wheel is stepped around. The wheel 40 has fixed thereupon wipers i7, .48, the wiper 4L8 engaging a segmental contact while the wiper 46 isattracted for successive engagement with contact buttons. iVhcel 40 and the wipers 4:7 and 1.8 are adapted to be stepped around as long as the wiper 48 engages its segmental contact, the circuit for the motor magnet '51-], beingopened to preventfurther operation oi the wheel 40 when the wiper 48 leaves its segmental contact;whereafter the wheel 40 is restored to normal byun'echanismwhich will be described. it'shonld be stated that circuitis closed through the magnet 41 (owing to the relationship of the disk with respect to the disks and substantially 30 before disk 32 closes circuit and (30" before disk closes circuit, the magnets all being energized during the periods that the brushes 38 and 39 are between. the most widely separated fingers 36 of the disks 12 and 33, whereby ample opportunity is all'orded for stepping the wiper 47 from one contactbutton to another.

The shaft 34 also carries ten disks' l9, 50,

* 5'1, 52, 53, 54, 55, 56, 57 and 58 that are respectively engaged by brushes 49 50 51, 52 53, 54-, 55 56 57 and 58 once upon each revolution of the shaft 34. The disks 4.9 to 58 inclusive are so related that their brushes are engaged in succession at intervals of 30 of the revolution of the shaft 34. The first disk 49 engages its brush 49 after the disk 45 chg ages its brush 46, by which arrangement the Jiushes 49 to 58 are electrically connected'with one termlnal of a grounded battery" 59 during the time that the printing wheels25 are at restf. The periph'e'ries of the printing wheels, for the purpose of my present invention, are rovided with printing'characters in the form of digits. The brush 49 is connected with the battery 59 when the printing wheels25 are presenting digits 1 to the tapes-28 the brush 50 is connected with the battery 59 when the printing wheels 25 are presenting digits 2 to the tapes 28-; the brush 51 is connected with the battery 59 when. the printing wheels 25 are presenting'digit-s 3 to the tapes 28; and so on, brushes 52 53 54 55, 56, 57 and 58 being, respectively connected with the battery 59 when the printing wheels are presenting the digits 4, 5, 6, 7, 8, 9 and 0 to the tapes 28. Each tele phone line is provided with as many waiting contacts for its wiper 4721s there are digits in the number assigned to such telephone I line. These waiting contacts are connected v with those of the brushes 49 to 58 inclusive, that are connected with the battery 59 when the digits of the printing wheels 25 corresponding to calling lines are presented to the tape 28 belonging to the selected printing magnet 27, the magnets 27 constituting the portions of the signal receiving equipments that are selectively associated with the lines so that the tapes belonging thereto may receive record of the different calling lines that have selected the printing magnetspertaining thereto. Thus in the case of telephone station 1357 the lowermost button is connected with brush 49 ,'the next button above is connected with brushbl}, the next button above the latter button is connected with the brush 53 and the topmost button is connected with the brush 55 The wiper 4'? individual to each line is in cluded in circuit connection with the select cd printing magnet 27 by means of the wiper 18, one terminal of-each printing magnet 27 being grounded while the other tern'iinal of each printing magnet is 1nultiplied in the different selector switches. each selector switch having a waiting contact for its wiper 18 that belongs to but one print ing magnet.

By the equipment which has been described the number of the calling line is printed upon the tape 28 of the selected printing magnet 27, this operation being preferably performed within view of the operator who thereupon may depress her listening key 60 to bring her telephone set (31 into circuit with the talking wipers 146 and 17 and thereby into circuitwith the calling line to ascertain from the calling subscriber the number ofthe desired line whereafter the operator may, by any suitabie or preferred means connect the calling and csiied lines. 1 have shown well known cord connecting equipment 8 and Neil 45 tion. In my scription thereof will not be necessary exiceptmg to state that the ratchet wheel is restored to normal when a plug is insertedin the jack of a calling line.- When the jack of a calling line receives a plug, circuit is. established. through the cutoff relay 6 in a well known manner. As a consequence of which the circuit of relay 11 is opened so that the armature switch of relay 11 engages its normal contact to establish circuit through-the release magnet 62 and the previously closed contacts of the oii normal switch 63. The magnet 62 causes the side switch'wipers 14 and 20 to be restored to,

their initial positions and the wipers 15, 16, 17 and 18 are also restored to normal positions. When the side switch wiper 14 is restored to normal position circuit for the magnet 44. is opened whereby the upper armature switch of this magnet establishes a' circuit that may .be traced from the grounded battery 10 through the upper armature switch of magnet 44, the winding of release magnet 64, the contacts that were closed upon the initial movement of the ratchet wheel 40, to ground. The release magnet 64 thereupon withdraws the dog66 from engagement with the, wheel 40 whereupon the spring 67 will restore the wheel 4 Oto normal, the wheel carrying the wipers i7, 48 to normal.

Those familiar-with the art are acquainted with the system disclosed in British Patent 1298 of 1910 and are also familiar with the mechanical construction ofthe switches described in Van Deventers Telephonology, page 530, and it will therefore be unnecessary to describe in detail the selector switches which I have employed for selecting the responsive devices 27'that are freefor selecapplications Serial Nos.

7 09,423 and 709,424 I have also disclosed and claimed equipment for automatically a prisii}; the operators of the numbers of telephone lines.

{55 readily be made without departing o p. .1: ;A signalingfsys :50 -While I have herein shown and particularly described the preferred embodiment oi my inven'tioml do not wish to be limited to the precise details of construction and circuit arrangement illustrated as changes may om the spirit of my invent-1011, but- 7 Having thus described my invention 1 claim as new and desire to secure by Letters Patent; ithe =following; 1

including a pluralityofsignalingrlinesvisual signal receivers; selector switches. or selecting signal re- .ceiversthatlare freefor selection, and assomating the; saine==withsignaling; lines; and

oe' means tihelinesiand. which flit-,-

fer from each other for causing said signal receivers to give characteristic signals peculiar to the'lines.

2. A signaling system including a plurality of signaling lines; recording signal receivers; selector switches for selecting signal receivers that are free for selection and associating the same with signaling lines; and

means individual to the lines and which differ from each other for causing said signal receivers to givecharacteristic signals peculiar to the lines.

l 3. A signaling system including a plurality of signaling lines; signal receivers; selector switches for selecting signal receivers that are free for selection and associating the same with signaling lines; means individual to the lines and which differ from each other for causing said signal receivers to give characteristic signals peculiar to the lines; a plurality of circuits for effecting successive operations of each signal receiver; and means set into operation by each signalin line and associated with the selected signa receivers that are free for selection and for establishing the signal receiver controlling circuits of a signaling line in succession through the selected signal receiver.

4. A signaling-system including a plurality of signaling lines; recording signal receivers; selector switches for selecting signal receivers; that are free for selection and associating the same with signaling lines; meansindividual to the lines and which differ from each other for causing said signal receivers to give characteristic'signals peculiar to the llnes; a plurality of circuits for eifecting successive operations of each signal receiver; and means set into operation by each signaling line and associated with the selected signal receiver by the operated selector switch ceiver controlling circuits of a signaling line in succession through the selected signal receiver.

5. A signaling system including a plurality of signaling lines; visual signal receivers; selector switches for selecting signal receivers that are free for selection and associating the same with signaling lines; means individual to the lines and which difier from each other for causing said signal receivers to give characteristic signals peculiar to the lines; a plurality of circuits for effecting successive operations of each signal receiver; and means set into operation by each signaling line and associated with the selected sig 'nal receiver by the operated selector switch for establishing the signal receiver controlling circuits of a signaling line in succession through the selected signal receivers.

6. A telephone system including a plurality of telephone lmes extending to exchange operators positions;

for establishing the signal revisual signal receivers at said operators positions; selector switches for selecting signal receivers that are free for selection and associating the same with calling lines; and means individual to the lines and whiclu differ from each other for causing said signal receivers to give characteristic signals peculiar to the calling lines.

7. A telephone system including a plurality of telephone lines extending to exchange calling lines.

8. A telephone system including a plural ity of telephone lines extending to exchange operators positions; signal receivers at said operators positions; selector switches for selecting signal receivers that are free for selection and associating the same with calling telephone lines; means individual to the lines and which differ from each other for causing said signal receivers to give characteristic signals peculiar to the lines; a plurality oi circuits for effecting successive operations of each signal receiver; and means set into operation by each calling telephone line and associated with the selected signal receiver by the operated selector switch for establishing the signal receiver controlling circuits of a calling telephone line in succession through the selected signal receiver.

9. A telephone system including a plurality of telephone lines extending to exchange operators positions; recording signal receiversat said operators positions; selector switches for selecting signal receivers that V are free for selection and associating the same with calling telephone lines; means in- .dividual to the lines and which differ from each other for causing said signal receivers to give characteristic signals peculiar to the lines; a plurality of clrcuits for effecting successive operations of each signal receiver; and means set into operation by each calling telephone line and'associated with the selected signal receiver by the operated selector switch for establishing the signal receiver controlling circuits of a calling telephone line in succession through the selected signal receiver.

10. A telephone system including a plurality of telephone lines extending to exchange operators positions; visual signal receivers at said operators positions; selector switches for selectingsignal receivers that are free for selection-and associating the same with calling telephone lines; means individual to the lines and which differ from each other for causing said signal receivers to-give characteristic signals peculiar to the lines; a plurality of circuits for effecting successive operations of each signal receiver; and means'set into operation by each calling telephone line and associated with the selected signal receiver by the oPerated'selector switch for establishing the signal receiver controlling circuits of a calling telephone line in successionthrough the selected signal receiver.

In witness whereof, -I hereunto subscribe my name this third day of July A. D., 1912.

MORTON L. JOHNSON Witnesses G. L. GRAee, E. L.Wm'rn.

Gopiel of this pltent may be obtained fol-rive cents each, by addressing'the Commissioner of Patents.

y I D. or 

